1// -*- C++ -*- 2 3// Copyright (C) 2005 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 31 32// Permission to use, copy, modify, sell, and distribute this software 33// is hereby granted without fee, provided that the above copyright 34// notice appears in all copies, and that both that copyright notice and 35// this permission notice appear in supporting documentation. None of 36// the above authors, nor IBM Haifa Research Laboratories, make any 37// representation about the suitability of this software for any 38// purpose. It is provided "as is" without express or implied warranty. 39 40/** 41 * @file erase_if_example.cpp 42 * A basic example showing how to use erase_if. 43 */ 44 45// For various associative containers. 46#include <ext/pb_assoc/assoc_cntnr.hpp> 47// For cout, endl. 48#include <iostream> 49// For assert. 50#include <cassert> 51 52struct between : public std::unary_function< 53 std::pair<const int, char>, 54 bool> 55{ 56 between(int b, int e) : m_b(b), 57 m_e(e) 58 { } 59 60 inline bool 61 operator()(std::pair<const int, char>& r_val) 62 { 63 return (r_val.first >= m_b&& r_val.first < m_e); 64 } 65 66private: 67 const int m_b; 68 const int m_e; 69}; 70 71template<class Cntnr> 72void 73some_op_sequence(Cntnr c) 74{ 75 assert(c.empty()); 76 assert(c.size() == 0); 77 78 for (int i = 0; i < 100; ++i) 79 c.insert(std::make_pair(i, static_cast<char>(i))); 80 81 assert(c.size() == 100); 82 83 /* Erase all values whose key is between 10 (inclusive) 84 * and 90 (non-inclusive). 85 */ 86 c.erase_if(between(10 , 90)); 87 88 assert(!c.empty()); 89 assert(c.size() == 20); 90} 91 92int 93main() 94{ 95 96 /* 97 * Perform operations on a list-update set. 98 */ 99 some_op_sequence(pb_assoc::lu_assoc_cntnr<int, char>()); 100 101 /* 102 * Perform operations on a collision-chaining hash set. 103 */ 104 some_op_sequence(pb_assoc::cc_hash_assoc_cntnr<int, char>()); 105 106 /* 107 * Perform operations on a general-probing hash set. 108 */ 109 some_op_sequence(pb_assoc::gp_hash_assoc_cntnr<int, char>()); 110 111 /* 112 * Perform operations on a red-black tree set. 113 */ 114 some_op_sequence(pb_assoc::tree_assoc_cntnr<int, char>()); 115 116 /* 117 * Perform operations on a splay tree set. 118 */ 119 some_op_sequence(pb_assoc::tree_assoc_cntnr< 120 int, 121 char, 122 std::less<int>, 123 pb_assoc::splay_tree_ds_tag>()); 124 125 /* 126 * Perform operations on a splay tree set. 127 */ 128 some_op_sequence(pb_assoc::tree_assoc_cntnr< 129 int, 130 char, 131 std::less<int>, 132 pb_assoc::ov_tree_ds_tag>()); 133} 134